HTTP Header Command Injection - X-FORWARDED-FOR - Pentesting Web
if (isset($_SERVER['HTTP_X_FORWARDED_FOR'])) {
$ip = $_SERVER['HTTP_X_FORWARDED_FOR'];
} else {
$ip = $_SERVER['REMOTE_ADDR'];
};
system("sudo /usr/sbin/iptables -A INPUT -s " . $ip . " -j ACCEPT");
?>


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